manuscript in press (Claude Alain )

For those interested, I would be happy to send out a draft copy of a
manuscript currently in press in JEP:HPP.
Alain, C., Arnott, S R, & Picton, T. W. Bottom-up and top-down
influences on auditory scene analysis: Evidence from event-related brain
potentials
The physiological processes underlying the segregation of concurrent
sounds were investigated using event-related brain potentials. The
stimuli were complex sounds containing multiple harmonics, one of which
could be "mistuned" so it was no longer an integer multiple of the
fundamental. The perception of concurrent auditory objects increased
with the degree of mistuning, and was accompanied by negative and
positive waves that peaked at 180 and 400 ms post-stimulus
respectively. The negative wave, referred to as the =93object-related
negativity=94, was present during passive listening but the positive wave
was not present. These findings indicate bottom-up and top-down
influences during auditory scene analysis. Brain electrical source
analyses showed that distinguishing simultaneous auditory objects
involved a widely distributed neural network that included auditory
cortices, medial temporal lobe and posterior association cortices.
Claude (calain(at)rotman-baycrest.on.ca)